Portia, If he should call today, call him later and wish him a Merry Christms.
If he should inquire as to why you haven't returned his calls, you can always say "I haven't been feeling the best and needed some time to get some rest and catch up on things around work and home". Keep your response very short and sweet. In fact the statement "it's that time of year when I have a lot to do and my focus has been on getting ready for the holidays" could be used.
I wouldn't stay on the phone w/him very long. He needs to wonder what you are doing. He needs to "sense" that you are pulling away and wonder why. He'll continue to call when he's in a panic and needs a fix from Portia, but Portia, it's time to take the sugar away and allow him to have withdrawal pangs.
Please take care of yourself.
Merry Christmas!
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
